This authentic ring is by David Yurman, crafted from sterling silver with a cable tapered ring, the top of the ring has a long faceted cut black onyx gemstone in partial wide bezel set prong decorated on each long top with round cut diamonds. It has the designer hallmark with the silver content stamp.Hallmark: D.Y 925Diamond: 35 points Color: H Clarity: VS1Gemstone: black onyx 22mm long x 11mm wideMaterial: sterling silverMeasurement: 0.89" long x 0.68" wide x 0.40" highRing Size: 6.5Weight: 11.5 grams